The cheapest times to fly from DCA to SLP are

  • January 8th to February 25th
  • May 14th to June 17th (except the week of May 21st)
  • August 6th to November 11th

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from DCA to SLP is early October. Prices can be as high as $1484 for Friday flights during early to mid May, or as low as $591 for Tuesday flights around early October.


When to Fly to San Luis Potosí

Flying from Washington, DC (DCA) to San Luis Potosi (SLP) will usually cost between $591 to $847 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early October with an average ticket price of $591. Due to high demand the most expensive time to fly is early to mid May, with an average price of $966. Planning your trip to low-cost times can easily save you $375 on economy flights and even more on first-class flights. Generally, any price below $595 can be considered a good price for a round-trip DCA to SLP flight.

See below for a graph of average weekly prices for the DCA to SLP route. All prices are for round-trip tickets in USD.

DCA to SLP Flight Prices

Compared to other flights, the DCA to SLP flight is cheaper than the average and costs less than the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.2, which is below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Fridays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $52 (8%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $611. Return trip prices are from the SLP to DCA flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from DCA to SLP can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 4 hour 15 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from DCA to SLP while comparing.

Destination alternative #1: Jesus Teran International Airport (AGU) in Aguascalientes

  • 97 miles (156 km) away from SLP
  • Usually 8.91% less expensive than SLP
  • 1-layover flights available

See DCA to AGU flights

Destination alternative #2: Guanajuato International Airport (BJX) in Leon/Guanajuato

  • 94 miles (151 km) away from SLP
  • Usually 6.30% less expensive than SLP
  • 1-layover flights available

See DCA to BJX flights


Flight Hacking DCA to SLP

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from DCA to SLP — but Champion Traveler does!

Hack #1: Monterrey (DCA > MTY > SLP)

  • Price for both tickets: $564
  • Average savings: $32 (5.29%)

See DCA to MTY flights

Hack #2: Mexico City (DCA > MEX > SLP)

  • Price for both tickets: $570
  • Average savings: $25 (4.2%)

See DCA to MEX flights

Hack #3: Puerto Vallarta (DCA > PVR > SLP)

  • Price for both tickets: $593
  • Average savings: $3 (0.42%)

See DCA to PVR flights


Flight Questions Answered

Still have questions about flying from DCA to SLP? We’ve got answers.

Which airlines fly this route?

You can find 5 major airlines flying this route most often: Aeromar, Aeromexico, American, Delta, United, and potentially more during busy seasons.

How far away is it from Ponciano Arriaga International Airport to Ronald Reagan Washington National Airport?

The distance between the two airports is roughly 1816 miles or 2923 kilometers.

How long does it take to fly from DCA to SLP?

The real-world flight time for a nonstop DCA to SLP flight is about 4 hour 15 minutes.

How many flights go between Washington, DC and San Luis Potosi?

It depends on the day of the week and the date, but a typical day might have around 40 available flights from DCA to SLP.


Airport Location Info


Departing Airport

Origination codeDCA
Origination airport nameRonald Reagan Washington National Airport
CityWashington, DC
Countrythe United States

Return Airport

Destination codeSLP
Destination airport namePonciano Arriaga International Airport
CitySan Luis Potosi


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.